Okay so you’re able to access it via the IP it’s hosted on, but NOT via the domain name in the tunnel?
Is the working IP a public or private one?
My $5 is that you don’t have the tunnel configured properly and that’s why you’re having issues, but maybe not.
Also, what specifically did you put in the config file? Usually they’re not asking for an IP, but the FQDN of the site.
It’s viable, but when you’re buying a DAS for the drives, figure out what the USB chipset is and make sure it’s not a flaky piece of crap.
Things have gotten better, but some random manufacturers are still using trash bridge chips and you’ll be in for a bad time. (By which I mean your drives will vanish in the middle of a write, and corrupt themselves.)